Dingtai manufactures a complete range of Sumitomo excavator undercarriage parts: track rollers, idlers, sprockets, and chains, ensuring load support and traction.
As a factory-direct manufacturer, we offer comprehensive OEM services, producing custom undercarriage parts that meet original equipment specifications for global distributors.
Our heat-treated parts resist premature wear, cracking, and oil leakage, minimizing unscheduled downtime and extending replacement intervals in harsh job sites.
With 20+ years of experience and ISO9001/SGS certifications, we deliver consistent quality and full traceability throughout the manufacturing process.
We use 35MnB steel forgings with deep induction quenching, achieving a case depth of 4–8 mm for excellent impact resistance.
Core Selling Points
- 20+ Years Experience: With over 20 years of specialization, we engineer Sumitomo-compatible parts that meet the exacting demands of global heavy equipment fleets.
- Global Brand Compatibility: Our components are direct-fit replacements for Sumitomo SH series excavators, ensuring bolt-on installation and seamless integration with original OEM specs.
- Premium 35MnB & Heat Treatment: We employ 35MnB forgings and deep induction quenching to reach HRC 52–58, providing unmatched wear resistance under heavy loads.
- 100% QC Inspection: We perform 100% dimensional, hardness, and MPI testing on all undercarriage components, ensuring each part meets rigorous quality benchmarks before dispatch.
Our catalog of Sumitomo Excavator Undercarriage Parts includes various specifications, fully compatible with Sumitomo excavators and bulldozers.
Why Choose Dingtai as Your Sumitomo Undercarriage Parts Supplier?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB Alloy Steel (optional 40Mn2) |
| Surface Hardness | HRC 52–58 |
| Case Depth | 4–8 mm |
| Manufacturing Process | Precision Forging, CNC Machining, Induction Quenching |
| Certification | ISO9001, SGS |
| Warranty | 12 Months |
2. OEM & Customization
We accept customer drawings for custom dimensions, material grades, and heat treatment, all manufactured to meet or exceed OEM standards.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavator | Sumitomo | SH120, SH200, SH210, SH240, SH300, SH350, SH450, SH800 |
4. Delivery & Logistics
We provide factory-direct pricing, flexible MOQ, and reliable shipping to major US ports, reducing lead times and total landed cost.
Technical Features
Floating seal technology in our rollers prevents oil leakage and dirt entry, delivering maintenance-free operation up to 4,000 hours.
Idlers and sprockets are precision-forged from 35MnB steel, then induction-hardened to create a deep, wear-resistant surface layer that withstands impact.
Our track chains feature bimetal bushings that combine a wear-resistant inner bore with a ductile outer layer to prevent cracking.
Applications
Mining operations, road and highway construction, heavy quarrying, demolition, forestry, and large-scale earthmoving projects.
Frequently Asked Questions
Q: What is the minimum order quantity (MOQ) for Sumitomo undercarriage parts?
A: Typical MOQ is one pallet or 50 units per item, but we can accommodate trial orders at reduced quantities.
Q: What are your delivery times?
A: Standard production lead time is 25–35 days; urgent orders can be fast-tracked to 15 days.
Q: How deep is the heat treatment on your rollers?
A: We achieve an induction hardened case depth of 4–8 mm on rollers and idlers, measured from the tread surface.
Q: What warranty do you provide?
A: We provide a 12-month warranty against manufacturing defects, covering replacement of faulty parts.
Q: Can you supply parts by OEM part number?
A: Yes, we cross-reference your Sumitomo OEM part number to ensure exact fitment; send us your list.
Q: Do you offer samples for evaluation?
A: We can provide sample pieces for testing, subject to availability and freight terms.
Maintenance Guide
- Check roller oil level and seal integrity every 250 hours; replace any roller showing oil wetness or excessive end play.
- Monitor track sag and adjust tension to maintain the spec (typically 20–30 mm) between idler and carrier roller.
- Inspect sprocket tooth wear with a profile gauge; replace sprockets when tooth wear exceeds 25% of original height.
- Clean mud and debris from undercarriage regularly to prevent packed material that accelerates pin and bushing wear.